Why do we read and write from left to right and top to bottom?

Answer 1

because most people are right handed. it is the only way to write and not drag wet ink all over the page. you see, it used to take awhile for ink to dry

Answer 2

We picked up the practice from the Romans.
Nobody goes from bottom to top.

Answer 3

Dang if I know, and I sure as heck don't want
to change right now. Maybe if we went to
school in China, Japan, or Arabia we could
learn. You go first then I will go after you
return.